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x/2-2x=20
We move all terms to the left:
x/2-2x-(20)=0
We add all the numbers together, and all the variables
-2x+x/2-20=0
We multiply all the terms by the denominator
-2x*2+x-20*2=0
We add all the numbers together, and all the variables
x-2x*2-40=0
Wy multiply elements
x-4x-40=0
We add all the numbers together, and all the variables
-3x-40=0
We move all terms containing x to the left, all other terms to the right
-3x=40
x=40/-3
x=-13+1/3
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